googletag.cmd.push(function() {
    const BILLBOARD_ADUNIT_CODE = 'jsid-ad-container-billboard';
    var complete = false;
    var hasViewed = false;
    var hasScrolled = false;
    var slotEl;
    var slotRenderEndedListener = function(event, remove = false) {
        if (complete) {
            return;
        }
        // if (event && event.slot) {
        //     const slotId = event.slot.getSlotElementId();
        //     if (!slotId.startsWith(BILLBOARD_ADUNIT_CODE)) {
        //         return;
        //     }
        //     slotEl = document.getElementById(slotId);
        // }
        if (slotEl) {
            const billboardWrapper = document.querySelector('.billboard-flexsider-ad');
            if (billboardWrapper) {
                const navBar = document.getElementById('top-nav');
                if (remove) {
                    if (hasScrolled && hasViewed) {
                        googletag.pubads().removeEventListener("impressionViewable", impressionViewableListener);
                        setTimeout(function() {
                            billboardWrapper.style.top = '-' + billboardWrapper.offsetHeight + 'px';
                            navBar.style.top = '0px';

                            var transitionListener = function(event) {
                                billboardWrapper.removeEventListener("transitionend", transitionListener);
                                document.body.classList.remove('billboard-sticky');
                                ayManagerEnv.destroy([BILLBOARD_ADUNIT_CODE]);
                                billboardWrapper.remove();
                            };
                            billboardWrapper.addEventListener("transitionend", transitionListener);
                        }, 1000);
                    } else if (hasScrolled) {
                        setTimeout(function() {
                            slotRenderEndedListener(event, true);
                        }, 5000);
                    }
                } else {
                    navBar.style.top = event.creative_height + 'px';
                    document.body.classList.add('billboard-sticky');
                }
            }
        }
    };
    var impressionViewableListener = function(event) {
        hasViewed = true;
        slotRenderEndedListener(event, true);
    };

    var impressionListener = function(event) {
        var payload = event.data.payload;
        if (!payload.slotId.startsWith(BILLBOARD_ADUNIT_CODE)) {
            return;
        }
        slotEl = document.getElementById(payload.slotId);
        slotRenderEndedListener(payload, false);
        // window.removeEventListener('assertive_logImpression', impressionListener);
    };
    window.addEventListener('assertive_logImpression', impressionListener);
    googletag.pubads().addEventListener("impressionViewable", impressionViewableListener);

    var scrollListener = function(event) {
        hasScrolled = true;
        slotRenderEndedListener(null, true);
        document.removeEventListener('scroll', scrollListener);
    }
    document.addEventListener('scroll', scrollListener);
    
    var path = window.location.pathname;
    ayManagerEnv.onEvent('beforePageChange', function() {
        if (path !== window.location.pathname) {
            path = window.location.pathname;
            const topNav = document.getElementById('top-nav');
            if (topNav) {
                topNav.style.transition = 'none';
                topNav.style.top = null;
                setTimeout(function() {
                    topNav.style.transition = null;
                }, 0);
            }
        }
    });
});